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    11 Comments

    1. PurpleZombi3 on

      I learned about the magnetic metal needle from the survival movie The Edge with Anthony Hopkins. Thank you Hollywood!

    2. ChewyChagnuts on

      That’s why shipyards tend to be deliberately aligned with the earth’s magnetic field. If ships are built off this axis the steel off the hull can interfere with their compasses.

    3. Minimum_Classroom747 on

      Our hs science teacher taught us about this and I still wonder to this day when I am going to use this knowledge..

      Oh highschool….wish they just taught us trade skills like electricals, plumbing, carpentry, etc. instead (actual skills that will save you thousands of dollars)

    4. First time he howered the “needle” an inch above the metal scraps. Second time the needle needed to be submerged in scraps. Very sciency demonstration.

    5. iBUYbrokenSUBARUS on

      I don’t get it because technically he is forging it in a northern direction in the first part of the video. It’s just aiming north at its skinny width. How would the metal know if it’s long or the short measurement?

      If he were to snip off a little teeny piece and make a tiny rod that tiny rod would be facing south, even though the big piece is facing west

    6. iBUYbrokenSUBARUS on

      Why doesn’t he touch the metal to the scraps in the first part of the video like he does in a second? I smell bullshit. Besides, the metal is actually facing south in the first part of the video is just facing south by the short measurement width. How would the steel know. It would still become magnetic facing that direction if this worked true because the metal doesn’t know how long it is

    7. ultraganymede on

      this effect helps scientists to know the orientation of Earth’s magnetic field in the distant past by analyzing the magnetic orientation of certein rocks

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